From: Eli Zaretskii <eliz@gnu.org>
To: Manuel Giraud <manuel@ledu-giraud.fr>, Alan Third <alan@idiocy.org>
Cc: 74476@debbugs.gnu.org
Subject: bug#74476: [PATCH] Explore JPEG loading without quantization
Date: Sat, 30 Nov 2024 12:19:16 +0200 [thread overview]
Message-ID: <86iks581nf.fsf@gnu.org> (raw)
In-Reply-To: <871pz39v6p.fsf@ledu-giraud.fr> (bug-gnu-emacs@gnu.org)
> Date: Fri, 22 Nov 2024 15:53:18 +0100
> From: Manuel Giraud via "Bug reports for GNU Emacs,
> the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>
>
> While trying to speed up "emacs as an image viewer", I found that emacs
> is using libjpeg with color quantization and it seems that removing this
> quantization could speed up JPEG loading a bit.
>
> My simple limited benchmark:
>
> - M-: (clear-image-cache)
> - Open an image in folder with some large enough pictures in
> it (4000x3000 here)
> - M-: (benchmark-run 10 (image-next-file 1))
>
> Here are the results I get:
>
> without this path: (5.415405491 1 0.09232176400000025)
> with: (3.079911418 1 0.0751190459999993)
>
> I don't think that this patch could be applied as is (it is rather
> ugly). And I also think that I probably have missed some (many?) use
> case (where color quantization is mandatory). But I'm submitting this
> patch anyway as a conversation starter on the subject.
Alan, any comments? I know nothing about this "color quantization"
aspect of JPEG images.
next prev parent reply other threads:[~2024-11-30 10:19 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-11-22 14:53 bug#74476: [PATCH] Explore JPEG loading without quantization Manuel Giraud via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-11-30 10:19 ` Eli Zaretskii [this message]
2024-11-30 11:44 ` Alan Third
2024-11-30 14:54 ` Manuel Giraud via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-11-30 15:37 ` Alan Third
2024-11-30 16:26 ` Manuel Giraud via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-11-30 17:25 ` Manuel Giraud via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-11-30 18:16 ` Alan Third
2024-11-30 18:32 ` Manuel Giraud via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-11-30 19:55 ` Alan Third
2024-11-30 18:49 ` Manuel Giraud via Bug reports for GNU Emacs, the Swiss army knife of text editors
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